Hormone:

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Hormone: A molecule produced in one organ that is secreted into the blood, and has a physiological effect on specific target cells in a different organ


Figure 13.4 A negative feedback loop involving a hormone.


Figure 13.1 Components of the human endocrine system. (1 of 2)


Figure 13.2 Mechanism of steroid hormone action on a target cell.


Figure 13.3 Mechanism of nonsteroid hormone action on a target cell.


Steroid Hormones

• cortisol, cortisone

• aldosterone

• testosterone

• estrogen

• progesterone


Table 13.2 Hormones of the endocrine glands other than the hypothalamus and pituitary (1 of 2)


Figure 13.11 Secretion of norepinephrine and epinephrine by the adrenal medulla.


Endocrine glands that are composed of nerve cells

• Posterior pituitary

• Adrenal medulla


Table 13.2 Hormones of the endocrine glands other than the hypothalamus and pituitary (2 of 2)


Figure 13.12 The thyroid and parathyroid glands.


Figure 13.14 A goiter caused by dietary iodine deficiency.


Table 13.1 Hormones of the pituitary gland


Figure 13.8 Effect of growth hormone on body growth.


Figure 13.5 Posterior pituitary lobe and hypothalamus. (2 of 2)


Figure 13.7 The relationship between the hypothalamus and the anterior pituitary gland.


Thyroid follicle


Thyroid follicle

Colloid Follicular epithelium


Acini Pancreatic islets

Duct


Acini Ducts Pancreatic islets


Posterior pituitary

Anterior pituitary


Adrenal capsule

Adrenal cortex

Adrenal medulla


Table 13.4 Other chemical messengers


Table 13.3 Hormones of the digestive tract, kidneys, and heart (DON’T NEED TO KNOW DETAILS)

Hormone:

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